id say its a lot better than 10K Boost, ive got some Wynns Carb Cleaner which is essentially the same as 10K Boost an it doesnt seem to do anythin
ive used Redex in my petrol for a while now, mainly as it stops corrosion, but also to help keep the internals clean, like Optimax
if you get some, dont be lazy an just stick it in the tank, do the plugs thing, my car today on the way to work was the smoothest its ever been
all you do is get your car nice an toasty, turn off igntion, get ur plugs out, pour 50ml down each hole, leave for 30 minutes, put a rag over all the holes, turn the car over for 10 seconds, stick the plugs back, drive around for about 10 minutes
you might find the car a little difficult to start at first, but try a few times in short bursts and it WILL start dont worry, try hittin the gas a bit to help it out, and you may find you need to keep the revs high for the first 2-3 minutes of driving, after that just cruise around for a bit until your confident its all through